4820-00-497-1656

Find complete technical information, availability, and procurement data for: 4820-00-497-1656
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-00-497-1656

Item Name Code

05487

Assigment Date

02/16/1971 (55 years ago)

A fitting having three connections with the branch connection fixed at 90 degrees (1.5705 radians) to the run. The tube connection(s) has machine threads (straight threads other than pipe or hose series) designed to accommodate a tube, or is unthreaded and designed to accommodate a tube. The boss connection(s) has external or internal machine threads (straight threads other than pipe or hose series), and is designed to facilitate a gasket, preformed packing, washer, or the like, to form a seal at the boss. It may have side inlet(s). It is used as a junction at the intersection of a tube or fitting and a boss or boss fitting on items such as a tank, housing, valve fitting, or the like. See also tee, tube; and tee, pipe to tube. Excludes:connector, multiple, fluid pressure line.

spring disk loading method, right-hand all ends thread direction, poppet flow control device, 3a all ends thread class, 106.0 fahrenheit single response maximum operating temp

Product Characteristics

Below you’ll find the complete technical specifications and performance data for this part, including material details and compliance information.

Thread Class: 3a all ends
Thread Direction: right-hand all ends
Flow Control Device: poppet
Disk Loading Method: spring
Maximum Operating Temp: 106.0 fahrenheit single response
Connection Style: flared (tube) all ends
Valve Operation Method: automatic
Connection Type: threaded external tube all ends
Mounting Position: horizontal or vertical
Maximum Operating Pressure: 3000.0 pounds per square inch single response
Nominal Thread Size: 0.438 inches all ends
Seat Angle: 37.0 degrees all ends
Nominal Outside Diameter Tube Accommodated: 0.250 inches 2nd end
Nominal Outside Diameter Tube Accommodated: 0.250 inches 1st end
Material: steel comp 303 overall
Material Document And Classification: 66 fed std single material response overall
Media For Which Designed: air 1st response
Media For Which Designed: steam 2nd response
Media For Which Designed: water, fresh 3rd response
Surface Treatment: passivate
Style Designator: straight thru
Thread Series Designator: unf all ends

Related Parts

This NSN group includes multiple components designed to meet specific performance and operational standards. Each listing provides detailed specs, functionality data, and replacement compatibility information:

Part Number	Name
262T-4TT-.2	Check Valve
580R923H02	Check Valve

FAQs

Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.

What is the FSCG of the NSN 4820-00-497-1656?

The FSCG of the NSN 4820-00-497-1656 is 4820

Does the NSN 4820-00-497-1656 have a Schedule B code assigned?

Yes, the Schedule B code is 8481302090

Does NSN 4820-00-497-1656 require demilitarization?

Items subject to the export administration regulations (ear) in parts 730-774 of title 15, code of federal regulations (cfr) (ccli or ear99) and determined by dod to present a low risk when released out of dod control. No demil, mut, or end use certificate is required. May require an export licensefrom doc.

Does NSN 4820-00-497-1656 contain precious materials?

Precious metal content is unknown

Does NSN 4820-00-497-1656 contain hazardous materials?

Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.

When the NSN 4820-00-497-1656 was assigned to the Federal Catalog?

It was assigned 55 years ago, on Tue, Feb 16, 1971